Wall clock



FIG. 1 is a perspective view of wall clock showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof, the right side is identical; and,

FIG. 5 is a top view thereof, the bottom view is identical. 

The ornamental design for "wall clock", as shown and described. 